<?php
echo  "计算机用户输入两个数据的加减乘除的结果\n";
echo "请输入两个数据，用逗号分隔开来:\n";
$count=fscanf(STDIN,'%f ,%f %s',$a,$b, $other);
//var_dump($count,$a,$b,$other);
if($count>2){//count代表成功接收的数据个数
    echo "不要在输入的数据后面添加乱七八糟的东西~\n";
}else if($count < 2) {
    echo "请按要求的格式输入数据~\n";
}else{//正好输入了两个数据
    $jia=$a+$b;
    $jian=$a-$b;
    $cheng=$a*$b;
    $chu=$a^$b;

    echo "$a + $b =$jia\n";
    echo "$a - $b =$jian\n";
    echo "$a * $b =$cheng\n";
    echo "$a ^ $b =$chu\n";}

